Stop motion



H. BERLIN.

STOP MOTION.

APPLICATION FILED JULY 29,1920.

1,40 ,250, Patented Feb. 28, 1922.

2 SHEETS-SHEET l.

llV VE/V TOR. WITNESSES v flm BE/Pu/v H. BERLIN.

' STOP MOTION.

APPLICATION FILED JULY 29,1920.

1,408,250. Patpnted Feb. 28, 1922.

2 SHEETSSHEET 2.

INVEIVTOI? MFR/6584M! A TTOFNEYS PATENT OFFICE.

. HARRY BERLIN, OF NEW YORK, N. Y.

STOP MOTION.

Application filed July 29, 1920. Serial No. 399,752.

T 0 all whom it may concern.

Be it known that I, HARRY BERLIN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county and State of New York, have invented a new and Improved Stop Motion, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in knitting machines, and it pertains more particularly to a stop motion therefor. 7

It is the primary object of the present invention to provide a mechanism in which if one of the threads of the machine breaks, the machine will be automatically stopped in order that the article made by the ma chine will be free of imperfections owing to a continuation of the knitting operation when one of the threads has been broken.

With the above and other objects in view, reference is had to the accompanying drawings, in which Figure 1 is a fragmentary end view of a knitting machine showing the attachment in place thereon,

Fig. 2 is a detail view of the attachment operating mechanism;

- Fig. 3 is a similar view showing the position of the parts when the device has been set in operation;

Fig. 4 is a similar view showing the position of the parts after the stopping operation has been completed.

Referring more particularly to the drawings, the frame of the machine is designated by the reference character 5, and said frame has extending transversely thereof a power shaft 6, upon one end of which is mounted a loose pulley 7 and a driving pulley 8. The loose pulley 7 and driving pulley 8 are adapted to be engaged by means of a belt 9, and when said belt 9 is engaged with the driving pulley 8, the mechanism of the machine is operated, it being stopped when the belt engages the loose pulley 7 In carrying out the invention, a suitable bracket 10 is secured near the lower portion of the frame 5, and mounted for rotation in said bracket 10, is a shaft 11: driven by a chain 12 passing over sprockets 13 and 14. The sprocket 13 is carried by the shaft 11 and the sprocket 14 is carried by the power shaft 6. Mounted upon the end of the shaft 11 opposite to the sprocket 13, is a bevel gear 15, and said bevel gear 15 meshes with a bevel gear 16 carried'by a revoluble disk 17. Secured to the revoluble disk 17 and projecting from the periphery thereof, is a rigid finger 18, the purpose of which will be hereinafter described.

The reference character 19 designates a bracket projecting from one of the members of the frame, and it is to be understood that there is one of these brackets at each end of the machine. Revolubly mounted in the brackets 19, is a shaft 20, and said shaft carries a revoluble disk 21. The revoluble disk 21 is provided on its face with apin' 22, and pivotally secured to the face of the disk, as at 23, is a finger 24, a stop 25 being provided to limit the pivotal movement of the finger 24. Interposed between the pivoted finger 24 and the hub of the revoluble disk 21, is a coil'spring 24, said spring serving to maintain the pivoted finger 24 at all times against the stop 25.

Projecting vertically in parallelism with the end members of the frame, is a rigid rod 26, said rod 26 being mounted in guide bearings 27 Secured to the lower end of the rigid rod 26, is a foot 28 adapted to 1i in the path of the pin 22.

Pivotally secured to a standard 29 carried by the frame 5, as at 30, is a trigger lever 31, and one end of said trigger lever 31 is provided with a projection 32 adapted to engage the upper end of the rigid rod 26 as indicated by the reference character 33.

A rod 36 suitably mounted in brackets 34 and 35, has adjustably secured thereto a collar 3T. Secured to the rod or shaft 36, is a second collar 38, and interposed between said collar 38 and the bracket 35, is a spring 39, which spring serves to move the rod 36 in its bearings 34 and 35. Carried by the Specification of Letters Iatent. Patented Feb, 28, 1922,

rod 36 is an arm 40, and said arm has a j rigid extension 41 sliding in a bearing 42 to serve as a guide for the rigid rod 36. This rod 36 carries on its outer free end, the arm 43 of a belt-shifting mechanism, said arm carrying two spaced arms 44, between which the belt passes in traveling over either the loose pulley or driving pulley 7 and 8, respectively.

Loosely mounted on the shaft 20, is a pan 45 and rigidly projecting from a bracket 46 carried by the frame 5, at each end of the machine, is a rigid arm 47 The rigid arms 47 carry a depending wall 48, the

lower end of which overlapsthe angular outer edge $9 of the pan 4:5. This pan is secured to the disk 21 in such a manner that as the pan rocks about the shaft 20, the disk will be rotated on said shaft the purpose of which will be hereinafter referred to. An inclined plate is rigidly secured to the frame and projects over the rear edge of the pan 4L5, the purpose of which plate will also be hereinafter shown.

The reference character 51 designates one of the-threads leading'through the machine, said threads being carried by spoolsposr tioned in-any desired manner with respect to the machine. These threads run around guide rollers or rods53 and 5e1to theoperating needles of the machine. Between the guide rollers or rods 53 and'5 t, a substantially U-shaped piece ofmetal *is sus pended by each of the threads, and said U shaped piece of metal'is-of sufiicient weight to rock the pan 45 should the 'same fall thereon; These several U-shaped1 metal members are retained in position by reason of their engagement with the guide roller or rod 54:.

The above-described mechanism operates in the following manner: Assume for the purpose of illustration that the=mach1ne is running and one of the threads .51 should break. This action would drop the U-shaped piece of metal carried by this thread and thesame would be deposited in thepan4c5.

Upon thepiece of metal falling in the pan' 45, the pan is rocked to the dotted line position shown in Fig. 1 and to the full line position shown in Fig. 3. Asthe pan is rocked to the positionmentioned, the disk 21 will be revolved to a point where the pivot-ed finger 24; will lie in the path of the rigid finger 18 carried by the disk 17. This disk 17 being rotated by means of theshaft 11 and chain 12, will. cause a rotation of the disk 21.

During the rotation of the disk 21, the pin 22 carried thereby will engage thefoot 28 of the vertically-disposedrod 26'. Upon reciprocation of the rod 26,.the trigger lever 31 will be" rocked about its-pivotal point 30 until it disengages from the collar 37 on the shaft 36. Immediately the-trigger lever 31 disengages the collar 37, the rod or shaft 36* is moved to the dotted line position shown in Fig. 1, underthe influence of the-coil spring 39, and the belt9 will be shifted to the idle pulley 7, thusstopping the machine by reason of the fact that no power canbe transferred to the power shaft 6 through the medium of'the'loosepulley 7.

The angularly disposed wall 50 heretofore mentionedispositioned assho'wn in order-that the U-shaped pieces-ofmetal 55 in fallingtowards the pan are prevented fronientering into themaohin'e. thus assur ing-th'at the: u shaped-pieces-oawill at all times be deposited in the pan, and the wall 4:8 is provided to retain the U-shaped pieces in the pan.

From the foregoing it will be seen that each time one of the threads breaks, the

1. A stopmotion comprising in combination with the power shaft of a knitting machine,- a revoluble disk driven from said power shaft, a rigid finger carriedby said disk; a rsecond 'revoluble disk'mounted ada'o'ent the first-mentioned disk; means carried by said second-mentioned disk for engagement with the rigidfinger of-the firstmentioned disk; means I for operating' said second-mentioned revoluble diskto move the said finger-engaging means into the path ofthe finger carried by the first mentioned revoluble disk," and means operated by the second revolu'ble disk for" power of said machine.

2. A stop motion comprising in combination with'thepower shaft of aknitting machine, a revoluble disk driven from said powershaft, a rigid'finger carried by said dislga 'second revoluble disk mount-ed adjacent the first-mentioned disk, a springpressed finger carried by said second-men tioned disk and adapted for engagement with the rigid finger of the first-mentioned disk, means for operating said second-mentionedl revoluble disk. to move the said spring-pressed finger into the path of travel of the. finger carried by the first-mentioned revoluble' finger, and means operated by the cutting off the second-mentioned revoluble diskfor cutting 0d the power of the machine.

.3. A stop'motion comprising in combination with the power shaft of a knitting machine, a revoluble disk driven from said power shaft, arigid finger carried by said disk andprojectingj beyond the "periphery thereof, a second revoluble' disk mounted adjacent the first-mentioned disk, imeans carried by said second-mentioned disk for engagementavith the rigid finger of the first=- mentioned disk when moved into I thepath of travel thereof, means foroperating said seeond 'mentioned revoluble disk to move saidfingenengaging means into-the path of travel of the rigid fingercarried by'the firstmentioned revoluble disk, and means operated bythe second-mentioned revoluble disk for cutting off the power of said machine. '4. 'A stop" motion" comprising in "combination'with the power "shaft ofa knittin machine, a revoluble disk drivenfrom sai power shaft, a .rigichfinger carried by said. disk, a' second :revoluble diskunounted' ad jacent the first-mentioned disk, a resilient finger carried by said amend-mentioned disk for engagement with the rigid finger of the first-mentioned disk, means for operating said second-mentioned revoluble disk to move its resilient finger into the path of travel of the rigid finger 0f the first-mentioned revoluble disk, a rigid lug carried by the second-mentioned revoluble disk, and means adapted for engagement by said lug upon revolving movement of the second- 10 mentioned revoluble disk for cutting 0-fl:' the power of said machine.

HARRY BERLIN. 

